tty/module.c
author Florian Pose <fp@igh-essen.com>
Mon, 09 Jan 2012 17:42:28 +0100
changeset 2240 b45438edf869
parent 2028 55854f070c4a
child 2393 5d7d2722dfaa
permissions -rw-r--r--
Avoided unused variable warnings.
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/******************************************************************************
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 *
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 *  $Id$
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 *
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 *  Copyright (C) 2006-2008  Florian Pose, Ingenieurgemeinschaft IgH
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 *
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 *  This file is part of the IgH EtherCAT Master.
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 *
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 *  The IgH EtherCAT Master is free software; you can redistribute it and/or
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 *  modify it under the terms of the GNU General Public License version 2, as
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 *  published by the Free Software Foundation.
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 *
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 *  The IgH EtherCAT Master is distributed in the hope that it will be useful,
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 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
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 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General
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 *  Public License for more details.
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 *
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 *  You should have received a copy of the GNU General Public License along
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 *  with the IgH EtherCAT Master; if not, write to the Free Software
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 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
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 *
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 *  ---
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 *
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 *  The license mentioned above concerns the source code only. Using the
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 *  EtherCAT technology and brand is only permitted in compliance with the
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 *  industrial property and similar rights of Beckhoff Automation GmbH.
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 *
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 *****************************************************************************/
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/** \file
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 * EtherCAT tty driver module.
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 */
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/*****************************************************************************/
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#include <linux/module.h>
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#include <linux/err.h>
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#include <linux/tty.h>
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#include <linux/tty_driver.h>
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#include <linux/tty_flip.h>
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#include <linux/termios.h>
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#include <linux/timer.h>
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#include <linux/version.h>
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#include <linux/serial.h>
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#include <linux/uaccess.h>
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#include <linux/slab.h>
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#include "../master/globals.h"
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#include "../include/ectty.h"
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/*****************************************************************************/
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#define PFX "ec_tty: "
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#define EC_TTY_MAX_DEVICES 32
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#define EC_TTY_TX_BUFFER_SIZE 100
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#define EC_TTY_RX_BUFFER_SIZE 100
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#define EC_TTY_DEBUG 0
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/*****************************************************************************/
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char *ec_master_version_str = EC_MASTER_VERSION; /**< Version string. */
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unsigned int debug_level = 0;
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static struct tty_driver *tty_driver = NULL;
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ec_tty_t *ttys[EC_TTY_MAX_DEVICES];
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struct ec_mutex_t tty_sem;
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void ec_tty_wakeup(unsigned long);
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/*****************************************************************************/
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/** \cond */
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MODULE_AUTHOR("Florian Pose <fp@igh-essen.com>");
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MODULE_DESCRIPTION("EtherCAT TTY driver module");
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MODULE_LICENSE("GPL");
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MODULE_VERSION(EC_MASTER_VERSION);
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module_param_named(debug_level, debug_level, uint, S_IRUGO);
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MODULE_PARM_DESC(debug_level, "Debug level");
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/** \endcond */
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/** Standard termios for ec_tty devices.
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 *
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 * Simplest possible configuration, as you would expect.
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 */
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static struct ktermios ec_tty_std_termios = {
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    .c_iflag = 0,
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    .c_oflag = 0,
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    .c_cflag = B9600 | CS8 | CREAD,
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    .c_lflag = 0,
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    .c_cc = INIT_C_CC,
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};
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struct ec_tty {
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    int minor;
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    struct device *dev;
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    uint8_t tx_buffer[EC_TTY_TX_BUFFER_SIZE];
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    unsigned int tx_read_idx;
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    unsigned int tx_write_idx;
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    unsigned int wakeup;
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    uint8_t rx_buffer[EC_TTY_RX_BUFFER_SIZE];
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    unsigned int rx_read_idx;
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    unsigned int rx_write_idx;
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    struct timer_list timer;
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    struct tty_struct *tty;
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    unsigned int open_count;
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    struct ec_mutex_t sem;
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    ec_tty_operations_t ops;
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    void *cb_data;
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};
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static const struct tty_operations ec_tty_ops; // see below
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/*****************************************************************************/
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/** Module initialization.
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 *
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 * \return 0 on success, else < 0
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 */
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int __init ec_tty_init_module(void)
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{
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    int i, ret = 0;
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    printk(KERN_INFO PFX "TTY driver %s\n", EC_MASTER_VERSION);
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    ec_mutex_init(&tty_sem);
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    for (i = 0; i < EC_TTY_MAX_DEVICES; i++) {
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        ttys[i] = NULL;
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    }
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    tty_driver = alloc_tty_driver(EC_TTY_MAX_DEVICES);
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    if (!tty_driver) {
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        printk(KERN_ERR PFX "Failed to allocate tty driver.\n");
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        ret = -ENOMEM;
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        goto out_return;
d9bbbe1883ab Register a TTY driver with one device.
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diff changeset
   145
    }
d9bbbe1883ab Register a TTY driver with one device.
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diff changeset
   146
d9bbbe1883ab Register a TTY driver with one device.
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   147
    tty_driver->owner = THIS_MODULE;
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diff changeset
   148
    tty_driver->driver_name = "EtherCAT TTY";
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diff changeset
   149
    tty_driver->name = "ttyEC";
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   150
    tty_driver->major = 0;
d9bbbe1883ab Register a TTY driver with one device.
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diff changeset
   151
    tty_driver->minor_start = 0;
d9bbbe1883ab Register a TTY driver with one device.
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diff changeset
   152
    tty_driver->type = TTY_DRIVER_TYPE_SERIAL;
d9bbbe1883ab Register a TTY driver with one device.
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diff changeset
   153
    tty_driver->subtype = SERIAL_TYPE_NORMAL;
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diff changeset
   154
    tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
d9bbbe1883ab Register a TTY driver with one device.
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diff changeset
   155
    tty_driver->init_termios = ec_tty_std_termios;
d9bbbe1883ab Register a TTY driver with one device.
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diff changeset
   156
    tty_set_operations(tty_driver, &ec_tty_ops);
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diff changeset
   157
d9bbbe1883ab Register a TTY driver with one device.
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diff changeset
   158
    ret = tty_register_driver(tty_driver);
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   159
    if (ret) {
1570
7a2a58107dd8 Use own PFX for printk.
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   160
        printk(KERN_ERR PFX "Failed to register tty driver.\n");
1568
d9bbbe1883ab Register a TTY driver with one device.
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diff changeset
   161
        goto out_put;
d9bbbe1883ab Register a TTY driver with one device.
Florian Pose <fp@igh-essen.com>
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diff changeset
   162
    }
d9bbbe1883ab Register a TTY driver with one device.
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   163
d9bbbe1883ab Register a TTY driver with one device.
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diff changeset
   164
    return ret;
d9bbbe1883ab Register a TTY driver with one device.
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diff changeset
   165
        
d9bbbe1883ab Register a TTY driver with one device.
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diff changeset
   166
out_put:
d9bbbe1883ab Register a TTY driver with one device.
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diff changeset
   167
    put_tty_driver(tty_driver);
d9bbbe1883ab Register a TTY driver with one device.
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diff changeset
   168
out_return:
1565
8c526cfe1399 Base files for new TTY driver.
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parents:
diff changeset
   169
    return ret;
8c526cfe1399 Base files for new TTY driver.
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parents:
diff changeset
   170
}
8c526cfe1399 Base files for new TTY driver.
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parents:
diff changeset
   171
8c526cfe1399 Base files for new TTY driver.
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   172
/*****************************************************************************/
8c526cfe1399 Base files for new TTY driver.
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parents:
diff changeset
   173
8c526cfe1399 Base files for new TTY driver.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   174
/** Module cleanup.
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   175
 *
8c526cfe1399 Base files for new TTY driver.
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   176
 * Clears all master instances.
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diff changeset
   177
 */
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   178
void __exit ec_tty_cleanup_module(void)
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   179
{
1568
d9bbbe1883ab Register a TTY driver with one device.
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   180
    tty_unregister_driver(tty_driver);
d9bbbe1883ab Register a TTY driver with one device.
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diff changeset
   181
    put_tty_driver(tty_driver);
1570
7a2a58107dd8 Use own PFX for printk.
Florian Pose <fp@igh-essen.com>
parents: 1569
diff changeset
   182
    printk(KERN_INFO PFX "Module unloading.\n");
1565
8c526cfe1399 Base files for new TTY driver.
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parents:
diff changeset
   183
}
8c526cfe1399 Base files for new TTY driver.
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parents:
diff changeset
   184
1786
7198caede741 Sorted methods.
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diff changeset
   185
/******************************************************************************
7198caede741 Sorted methods.
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diff changeset
   186
 * ec_tty_t methods.
7198caede741 Sorted methods.
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diff changeset
   187
 *****************************************************************************/
1577
fa3f66b783c1 Implemented reading direction of tty driver.
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diff changeset
   188
1789
058248c47ba0 Pass initial cflag to device-specific implementation in constructor.
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diff changeset
   189
int ec_tty_init(ec_tty_t *t, int minor,
1787
439f186185be Callback set via own structure.
Florian Pose <fp@igh-essen.com>
parents: 1786
diff changeset
   190
        const ec_tty_operations_t *ops, void *cb_data)
1577
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   191
{
1789
058248c47ba0 Pass initial cflag to device-specific implementation in constructor.
Florian Pose <fp@igh-essen.com>
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diff changeset
   192
    int ret;
058248c47ba0 Pass initial cflag to device-specific implementation in constructor.
Florian Pose <fp@igh-essen.com>
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diff changeset
   193
    tcflag_t cflag;
058248c47ba0 Pass initial cflag to device-specific implementation in constructor.
Florian Pose <fp@igh-essen.com>
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diff changeset
   194
    struct tty_struct *tty;
058248c47ba0 Pass initial cflag to device-specific implementation in constructor.
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diff changeset
   195
058248c47ba0 Pass initial cflag to device-specific implementation in constructor.
Florian Pose <fp@igh-essen.com>
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diff changeset
   196
    t->minor = minor;
058248c47ba0 Pass initial cflag to device-specific implementation in constructor.
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diff changeset
   197
    t->tx_read_idx = 0;
058248c47ba0 Pass initial cflag to device-specific implementation in constructor.
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diff changeset
   198
    t->tx_write_idx = 0;
058248c47ba0 Pass initial cflag to device-specific implementation in constructor.
Florian Pose <fp@igh-essen.com>
parents: 1787
diff changeset
   199
    t->wakeup = 0;
058248c47ba0 Pass initial cflag to device-specific implementation in constructor.
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diff changeset
   200
    t->rx_read_idx = 0;
058248c47ba0 Pass initial cflag to device-specific implementation in constructor.
Florian Pose <fp@igh-essen.com>
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diff changeset
   201
    t->rx_write_idx = 0;
058248c47ba0 Pass initial cflag to device-specific implementation in constructor.
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diff changeset
   202
    init_timer(&t->timer);
058248c47ba0 Pass initial cflag to device-specific implementation in constructor.
Florian Pose <fp@igh-essen.com>
parents: 1787
diff changeset
   203
    t->tty = NULL;
1797
5bf740cd1599 Allow multiple open() calls to tty devices.
Florian Pose <fp@igh-essen.com>
parents: 1796
diff changeset
   204
    t->open_count = 0;
2028
55854f070c4a use rt_mutex instead of semaphore for mutual exclusion (use --enable-mutex)
Martin Troxler <ch1010277@ch10pc446>
parents: 1975
diff changeset
   205
    ec_mutex_init(&t->sem);
1789
058248c47ba0 Pass initial cflag to device-specific implementation in constructor.
Florian Pose <fp@igh-essen.com>
parents: 1787
diff changeset
   206
    t->ops = *ops;
058248c47ba0 Pass initial cflag to device-specific implementation in constructor.
Florian Pose <fp@igh-essen.com>
parents: 1787
diff changeset
   207
    t->cb_data = cb_data;
058248c47ba0 Pass initial cflag to device-specific implementation in constructor.
Florian Pose <fp@igh-essen.com>
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diff changeset
   208
058248c47ba0 Pass initial cflag to device-specific implementation in constructor.
Florian Pose <fp@igh-essen.com>
parents: 1787
diff changeset
   209
    t->dev = tty_register_device(tty_driver, t->minor, NULL);
058248c47ba0 Pass initial cflag to device-specific implementation in constructor.
Florian Pose <fp@igh-essen.com>
parents: 1787
diff changeset
   210
    if (IS_ERR(t->dev)) {
1577
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   211
        printk(KERN_ERR PFX "Failed to register tty device.\n");
1789
058248c47ba0 Pass initial cflag to device-specific implementation in constructor.
Florian Pose <fp@igh-essen.com>
parents: 1787
diff changeset
   212
        return PTR_ERR(t->dev);
058248c47ba0 Pass initial cflag to device-specific implementation in constructor.
Florian Pose <fp@igh-essen.com>
parents: 1787
diff changeset
   213
    }
058248c47ba0 Pass initial cflag to device-specific implementation in constructor.
Florian Pose <fp@igh-essen.com>
parents: 1787
diff changeset
   214
058248c47ba0 Pass initial cflag to device-specific implementation in constructor.
Florian Pose <fp@igh-essen.com>
parents: 1787
diff changeset
   215
    // Tell the device-specific implementation about the initial cflags
058248c47ba0 Pass initial cflag to device-specific implementation in constructor.
Florian Pose <fp@igh-essen.com>
parents: 1787
diff changeset
   216
    tty = tty_driver->ttys[minor];
058248c47ba0 Pass initial cflag to device-specific implementation in constructor.
Florian Pose <fp@igh-essen.com>
parents: 1787
diff changeset
   217
058248c47ba0 Pass initial cflag to device-specific implementation in constructor.
Florian Pose <fp@igh-essen.com>
parents: 1787
diff changeset
   218
    if (tty && tty->termios) { // already opened before
058248c47ba0 Pass initial cflag to device-specific implementation in constructor.
Florian Pose <fp@igh-essen.com>
parents: 1787
diff changeset
   219
        cflag = tty->termios->c_cflag;
058248c47ba0 Pass initial cflag to device-specific implementation in constructor.
Florian Pose <fp@igh-essen.com>
parents: 1787
diff changeset
   220
    } else {
058248c47ba0 Pass initial cflag to device-specific implementation in constructor.
Florian Pose <fp@igh-essen.com>
parents: 1787
diff changeset
   221
        cflag = tty_driver->init_termios.c_cflag;
058248c47ba0 Pass initial cflag to device-specific implementation in constructor.
Florian Pose <fp@igh-essen.com>
parents: 1787
diff changeset
   222
    }
058248c47ba0 Pass initial cflag to device-specific implementation in constructor.
Florian Pose <fp@igh-essen.com>
parents: 1787
diff changeset
   223
    ret = t->ops.cflag_changed(t->cb_data, cflag);
058248c47ba0 Pass initial cflag to device-specific implementation in constructor.
Florian Pose <fp@igh-essen.com>
parents: 1787
diff changeset
   224
    if (ret) {
058248c47ba0 Pass initial cflag to device-specific implementation in constructor.
Florian Pose <fp@igh-essen.com>
parents: 1787
diff changeset
   225
        printk(KERN_ERR PFX "ERROR: Initial cflag 0x%x not accepted.\n",
058248c47ba0 Pass initial cflag to device-specific implementation in constructor.
Florian Pose <fp@igh-essen.com>
parents: 1787
diff changeset
   226
                cflag);
058248c47ba0 Pass initial cflag to device-specific implementation in constructor.
Florian Pose <fp@igh-essen.com>
parents: 1787
diff changeset
   227
        tty_unregister_device(tty_driver, t->minor);
058248c47ba0 Pass initial cflag to device-specific implementation in constructor.
Florian Pose <fp@igh-essen.com>
parents: 1787
diff changeset
   228
        return ret;
058248c47ba0 Pass initial cflag to device-specific implementation in constructor.
Florian Pose <fp@igh-essen.com>
parents: 1787
diff changeset
   229
    }
058248c47ba0 Pass initial cflag to device-specific implementation in constructor.
Florian Pose <fp@igh-essen.com>
parents: 1787
diff changeset
   230
058248c47ba0 Pass initial cflag to device-specific implementation in constructor.
Florian Pose <fp@igh-essen.com>
parents: 1787
diff changeset
   231
    t->timer.function = ec_tty_wakeup;
058248c47ba0 Pass initial cflag to device-specific implementation in constructor.
Florian Pose <fp@igh-essen.com>
parents: 1787
diff changeset
   232
    t->timer.data = (unsigned long) t;
058248c47ba0 Pass initial cflag to device-specific implementation in constructor.
Florian Pose <fp@igh-essen.com>
parents: 1787
diff changeset
   233
    t->timer.expires = jiffies + 10;
058248c47ba0 Pass initial cflag to device-specific implementation in constructor.
Florian Pose <fp@igh-essen.com>
parents: 1787
diff changeset
   234
    add_timer(&t->timer);
1577
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   235
    return 0;
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   236
}
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   237
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   238
/*****************************************************************************/
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   239
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   240
void ec_tty_clear(ec_tty_t *tty)
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   241
{
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   242
    del_timer_sync(&tty->timer);
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   243
    tty_unregister_device(tty_driver, tty->minor);
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   244
}
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   245
1778
94dbb44884ec Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents: 1595
diff changeset
   246
/*****************************************************************************/
94dbb44884ec Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents: 1595
diff changeset
   247
1786
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   248
unsigned int ec_tty_tx_size(ec_tty_t *tty)
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   249
{
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   250
    unsigned int ret;
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   251
    
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   252
    if (tty->tx_write_idx >= tty->tx_read_idx) {
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   253
        ret = tty->tx_write_idx - tty->tx_read_idx;
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   254
    } else {
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   255
        ret = EC_TTY_TX_BUFFER_SIZE + tty->tx_write_idx - tty->tx_read_idx;
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   256
    }
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   257
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   258
    return ret;
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   259
}
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   260
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   261
/*****************************************************************************/
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   262
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   263
unsigned int ec_tty_tx_space(ec_tty_t *tty)
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   264
{
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   265
    return EC_TTY_TX_BUFFER_SIZE - 1 - ec_tty_tx_size(tty);
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   266
}
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   267
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   268
/*****************************************************************************/
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   269
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   270
unsigned int ec_tty_rx_size(ec_tty_t *tty)
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   271
{
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   272
    unsigned int ret;
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   273
    
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   274
    if (tty->rx_write_idx >= tty->rx_read_idx) {
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   275
        ret = tty->rx_write_idx - tty->rx_read_idx;
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   276
    } else {
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   277
        ret = EC_TTY_RX_BUFFER_SIZE + tty->rx_write_idx - tty->rx_read_idx;
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   278
    }
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   279
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   280
    return ret;
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   281
}
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   282
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   283
/*****************************************************************************/
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   284
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   285
unsigned int ec_tty_rx_space(ec_tty_t *tty)
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   286
{
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   287
    return EC_TTY_RX_BUFFER_SIZE - 1 - ec_tty_rx_size(tty);
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   288
}
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   289
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   290
/*****************************************************************************/
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   291
1778
94dbb44884ec Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents: 1595
diff changeset
   292
int ec_tty_get_serial_info(ec_tty_t *tty, struct serial_struct *data)
94dbb44884ec Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents: 1595
diff changeset
   293
{
1779
9fab229d6ca9 Passing tty cflag to serial implementation.
Florian Pose <fp@igh-essen.com>
parents: 1778
diff changeset
   294
    struct serial_struct tmp;
9fab229d6ca9 Passing tty cflag to serial implementation.
Florian Pose <fp@igh-essen.com>
parents: 1778
diff changeset
   295
9fab229d6ca9 Passing tty cflag to serial implementation.
Florian Pose <fp@igh-essen.com>
parents: 1778
diff changeset
   296
    if (!data)
1778
94dbb44884ec Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents: 1595
diff changeset
   297
        return -EFAULT;
1779
9fab229d6ca9 Passing tty cflag to serial implementation.
Florian Pose <fp@igh-essen.com>
parents: 1778
diff changeset
   298
9fab229d6ca9 Passing tty cflag to serial implementation.
Florian Pose <fp@igh-essen.com>
parents: 1778
diff changeset
   299
    memset(&tmp, 0, sizeof(tmp));
9fab229d6ca9 Passing tty cflag to serial implementation.
Florian Pose <fp@igh-essen.com>
parents: 1778
diff changeset
   300
9fab229d6ca9 Passing tty cflag to serial implementation.
Florian Pose <fp@igh-essen.com>
parents: 1778
diff changeset
   301
    if (copy_to_user(data, &tmp, sizeof(*data))) {
9fab229d6ca9 Passing tty cflag to serial implementation.
Florian Pose <fp@igh-essen.com>
parents: 1778
diff changeset
   302
        return -EFAULT;
9fab229d6ca9 Passing tty cflag to serial implementation.
Florian Pose <fp@igh-essen.com>
parents: 1778
diff changeset
   303
    }
9fab229d6ca9 Passing tty cflag to serial implementation.
Florian Pose <fp@igh-essen.com>
parents: 1778
diff changeset
   304
    return 0;
1778
94dbb44884ec Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents: 1595
diff changeset
   305
}
94dbb44884ec Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents: 1595
diff changeset
   306
1786
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   307
/*****************************************************************************/
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   308
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   309
/** Timer function.
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   310
 */
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   311
void ec_tty_wakeup(unsigned long data)
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   312
{
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   313
    ec_tty_t *tty = (ec_tty_t *) data;
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   314
    size_t to_recv;
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   315
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   316
    /* Wake up any process waiting to send data */
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   317
    if (tty->wakeup) {
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   318
        if (tty->tty) {
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   319
#if EC_TTY_DEBUG >= 1
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   320
            printk(KERN_INFO PFX "Waking up.\n");
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   321
#endif
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   322
            tty_wakeup(tty->tty);
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   323
        }
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   324
        tty->wakeup = 0;
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   325
    }
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   326
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   327
    /* Push received data into TTY core. */
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   328
    to_recv = ec_tty_rx_size(tty);
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   329
    if (to_recv && tty->tty) {
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   330
        unsigned char *cbuf;
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   331
        int space = tty_prepare_flip_string(tty->tty, &cbuf, to_recv);
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   332
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   333
        if (space < to_recv) {
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   334
            printk(KERN_WARNING PFX "Insufficient space to_recv=%d space=%d\n",
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   335
                    to_recv, space);
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   336
        }
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   337
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   338
        if (space < 0) {
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   339
            to_recv = 0;
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   340
        } else {
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   341
            to_recv = space;
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   342
        }
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   343
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   344
        if (to_recv) {
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   345
            unsigned int i;
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   346
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   347
#if EC_TTY_DEBUG >= 1
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   348
            printk(KERN_INFO PFX "Pushing %u bytes to TTY core.\n", to_recv);
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   349
#endif
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   350
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   351
            for (i = 0; i < to_recv; i++) {
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   352
                cbuf[i] = tty->rx_buffer[tty->rx_read_idx];
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   353
                tty->rx_read_idx =
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   354
                    (tty->rx_read_idx + 1) % EC_TTY_RX_BUFFER_SIZE;
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   355
            }
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   356
            tty_flip_buffer_push(tty->tty);
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   357
        }
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   358
    }
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   359
    
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   360
    tty->timer.expires += 1;
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   361
    add_timer(&tty->timer);
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   362
}
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   363
1569
61f5f4c35883 Interface management.
Florian Pose <fp@igh-essen.com>
parents: 1568
diff changeset
   364
/******************************************************************************
61f5f4c35883 Interface management.
Florian Pose <fp@igh-essen.com>
parents: 1568
diff changeset
   365
 * Device callbacks
61f5f4c35883 Interface management.
Florian Pose <fp@igh-essen.com>
parents: 1568
diff changeset
   366
 *****************************************************************************/
61f5f4c35883 Interface management.
Florian Pose <fp@igh-essen.com>
parents: 1568
diff changeset
   367
1568
d9bbbe1883ab Register a TTY driver with one device.
Florian Pose <fp@igh-essen.com>
parents: 1565
diff changeset
   368
static int ec_tty_open(struct tty_struct *tty, struct file *file)
d9bbbe1883ab Register a TTY driver with one device.
Florian Pose <fp@igh-essen.com>
parents: 1565
diff changeset
   369
{
1571
88167b8589ef TTY open and close.
Florian Pose <fp@igh-essen.com>
parents: 1570
diff changeset
   370
    ec_tty_t *t;
1787
439f186185be Callback set via own structure.
Florian Pose <fp@igh-essen.com>
parents: 1786
diff changeset
   371
    int line = tty->index;
1571
88167b8589ef TTY open and close.
Florian Pose <fp@igh-essen.com>
parents: 1570
diff changeset
   372
1577
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   373
#if EC_TTY_DEBUG >= 1
1797
5bf740cd1599 Allow multiple open() calls to tty devices.
Florian Pose <fp@igh-essen.com>
parents: 1796
diff changeset
   374
    printk(KERN_INFO PFX "%s(tty=%p, file=%p): Opening line %i.\n",
5bf740cd1599 Allow multiple open() calls to tty devices.
Florian Pose <fp@igh-essen.com>
parents: 1796
diff changeset
   375
            __func__, tty, file, line);
1577
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   376
#endif
1571
88167b8589ef TTY open and close.
Florian Pose <fp@igh-essen.com>
parents: 1570
diff changeset
   377
1779
9fab229d6ca9 Passing tty cflag to serial implementation.
Florian Pose <fp@igh-essen.com>
parents: 1778
diff changeset
   378
    if (line < 0 || line >= EC_TTY_MAX_DEVICES) {
1797
5bf740cd1599 Allow multiple open() calls to tty devices.
Florian Pose <fp@igh-essen.com>
parents: 1796
diff changeset
   379
        tty->driver_data = NULL;
1779
9fab229d6ca9 Passing tty cflag to serial implementation.
Florian Pose <fp@igh-essen.com>
parents: 1778
diff changeset
   380
        return -ENXIO;
1571
88167b8589ef TTY open and close.
Florian Pose <fp@igh-essen.com>
parents: 1570
diff changeset
   381
    }
88167b8589ef TTY open and close.
Florian Pose <fp@igh-essen.com>
parents: 1570
diff changeset
   382
88167b8589ef TTY open and close.
Florian Pose <fp@igh-essen.com>
parents: 1570
diff changeset
   383
    t = ttys[line];
88167b8589ef TTY open and close.
Florian Pose <fp@igh-essen.com>
parents: 1570
diff changeset
   384
    if (!t) {
1797
5bf740cd1599 Allow multiple open() calls to tty devices.
Florian Pose <fp@igh-essen.com>
parents: 1796
diff changeset
   385
        tty->driver_data = NULL;
1571
88167b8589ef TTY open and close.
Florian Pose <fp@igh-essen.com>
parents: 1570
diff changeset
   386
        return -ENXIO;
88167b8589ef TTY open and close.
Florian Pose <fp@igh-essen.com>
parents: 1570
diff changeset
   387
    }
88167b8589ef TTY open and close.
Florian Pose <fp@igh-essen.com>
parents: 1570
diff changeset
   388
1797
5bf740cd1599 Allow multiple open() calls to tty devices.
Florian Pose <fp@igh-essen.com>
parents: 1796
diff changeset
   389
    if (!t->tty) {
5bf740cd1599 Allow multiple open() calls to tty devices.
Florian Pose <fp@igh-essen.com>
parents: 1796
diff changeset
   390
        t->tty = tty;
5bf740cd1599 Allow multiple open() calls to tty devices.
Florian Pose <fp@igh-essen.com>
parents: 1796
diff changeset
   391
        tty->driver_data = t;
5bf740cd1599 Allow multiple open() calls to tty devices.
Florian Pose <fp@igh-essen.com>
parents: 1796
diff changeset
   392
    }
5bf740cd1599 Allow multiple open() calls to tty devices.
Florian Pose <fp@igh-essen.com>
parents: 1796
diff changeset
   393
2028
55854f070c4a use rt_mutex instead of semaphore for mutual exclusion (use --enable-mutex)
Martin Troxler <ch1010277@ch10pc446>
parents: 1975
diff changeset
   394
    ec_mutex_lock(&t->sem);
1797
5bf740cd1599 Allow multiple open() calls to tty devices.
Florian Pose <fp@igh-essen.com>
parents: 1796
diff changeset
   395
    t->open_count++;
2028
55854f070c4a use rt_mutex instead of semaphore for mutual exclusion (use --enable-mutex)
Martin Troxler <ch1010277@ch10pc446>
parents: 1975
diff changeset
   396
    ec_mutex_unlock(&t->sem);
1571
88167b8589ef TTY open and close.
Florian Pose <fp@igh-essen.com>
parents: 1570
diff changeset
   397
    return 0;
1568
d9bbbe1883ab Register a TTY driver with one device.
Florian Pose <fp@igh-essen.com>
parents: 1565
diff changeset
   398
}
d9bbbe1883ab Register a TTY driver with one device.
Florian Pose <fp@igh-essen.com>
parents: 1565
diff changeset
   399
d9bbbe1883ab Register a TTY driver with one device.
Florian Pose <fp@igh-essen.com>
parents: 1565
diff changeset
   400
/*****************************************************************************/
d9bbbe1883ab Register a TTY driver with one device.
Florian Pose <fp@igh-essen.com>
parents: 1565
diff changeset
   401
d9bbbe1883ab Register a TTY driver with one device.
Florian Pose <fp@igh-essen.com>
parents: 1565
diff changeset
   402
static void ec_tty_close(struct tty_struct *tty, struct file *file)
d9bbbe1883ab Register a TTY driver with one device.
Florian Pose <fp@igh-essen.com>
parents: 1565
diff changeset
   403
{
1575
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   404
    ec_tty_t *t = (ec_tty_t *) tty->driver_data;
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   405
1577
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   406
#if EC_TTY_DEBUG >= 1
1797
5bf740cd1599 Allow multiple open() calls to tty devices.
Florian Pose <fp@igh-essen.com>
parents: 1796
diff changeset
   407
    printk(KERN_INFO PFX "%s(tty=%p, file=%p): Closing line %i.\n",
5bf740cd1599 Allow multiple open() calls to tty devices.
Florian Pose <fp@igh-essen.com>
parents: 1796
diff changeset
   408
            __func__, tty, file, tty->index);
5bf740cd1599 Allow multiple open() calls to tty devices.
Florian Pose <fp@igh-essen.com>
parents: 1796
diff changeset
   409
#endif
5bf740cd1599 Allow multiple open() calls to tty devices.
Florian Pose <fp@igh-essen.com>
parents: 1796
diff changeset
   410
5bf740cd1599 Allow multiple open() calls to tty devices.
Florian Pose <fp@igh-essen.com>
parents: 1796
diff changeset
   411
    if (t) {
2028
55854f070c4a use rt_mutex instead of semaphore for mutual exclusion (use --enable-mutex)
Martin Troxler <ch1010277@ch10pc446>
parents: 1975
diff changeset
   412
        ec_mutex_lock(&t->sem);
1797
5bf740cd1599 Allow multiple open() calls to tty devices.
Florian Pose <fp@igh-essen.com>
parents: 1796
diff changeset
   413
        if (--t->open_count == 0) {
5bf740cd1599 Allow multiple open() calls to tty devices.
Florian Pose <fp@igh-essen.com>
parents: 1796
diff changeset
   414
            t->tty = NULL;
5bf740cd1599 Allow multiple open() calls to tty devices.
Florian Pose <fp@igh-essen.com>
parents: 1796
diff changeset
   415
        }
2028
55854f070c4a use rt_mutex instead of semaphore for mutual exclusion (use --enable-mutex)
Martin Troxler <ch1010277@ch10pc446>
parents: 1975
diff changeset
   416
        ec_mutex_unlock(&t->sem);
1575
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   417
    }
1568
d9bbbe1883ab Register a TTY driver with one device.
Florian Pose <fp@igh-essen.com>
parents: 1565
diff changeset
   418
}
d9bbbe1883ab Register a TTY driver with one device.
Florian Pose <fp@igh-essen.com>
parents: 1565
diff changeset
   419
d9bbbe1883ab Register a TTY driver with one device.
Florian Pose <fp@igh-essen.com>
parents: 1565
diff changeset
   420
/*****************************************************************************/
d9bbbe1883ab Register a TTY driver with one device.
Florian Pose <fp@igh-essen.com>
parents: 1565
diff changeset
   421
d9bbbe1883ab Register a TTY driver with one device.
Florian Pose <fp@igh-essen.com>
parents: 1565
diff changeset
   422
static int ec_tty_write(
d9bbbe1883ab Register a TTY driver with one device.
Florian Pose <fp@igh-essen.com>
parents: 1565
diff changeset
   423
        struct tty_struct *tty,
d9bbbe1883ab Register a TTY driver with one device.
Florian Pose <fp@igh-essen.com>
parents: 1565
diff changeset
   424
        const unsigned char *buffer,
d9bbbe1883ab Register a TTY driver with one device.
Florian Pose <fp@igh-essen.com>
parents: 1565
diff changeset
   425
        int count
d9bbbe1883ab Register a TTY driver with one device.
Florian Pose <fp@igh-essen.com>
parents: 1565
diff changeset
   426
        )
d9bbbe1883ab Register a TTY driver with one device.
Florian Pose <fp@igh-essen.com>
parents: 1565
diff changeset
   427
{
1575
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   428
    ec_tty_t *t = (ec_tty_t *) tty->driver_data;
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   429
    unsigned int data_size, i;
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   430
    
1577
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   431
#if EC_TTY_DEBUG >= 1
1575
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   432
    printk(KERN_INFO PFX "%s(count=%i)\n", __func__, count);
1577
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   433
#endif
1575
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   434
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   435
    if (count <= 0) {
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   436
        return 0;
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   437
    }
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   438
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   439
    data_size = min(ec_tty_tx_space(t), (unsigned int) count);
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   440
    for (i = 0; i < data_size; i++) {
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   441
        t->tx_buffer[t->tx_write_idx] = buffer[i];
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   442
        t->tx_write_idx = (t->tx_write_idx + 1) % EC_TTY_TX_BUFFER_SIZE;
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   443
    }
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   444
1577
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   445
#if EC_TTY_DEBUG >= 1
1575
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   446
    printk(KERN_INFO PFX "%s(): %u bytes written.\n", __func__, data_size);
1577
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   447
#endif
1575
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   448
    return data_size;
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   449
}
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   450
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   451
/*****************************************************************************/
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   452
1595
8d8657654921 Implemented tty put_char and break_ctl callbacks for kernels newer than 2.6.26
Florian Pose <fp@igh-essen.com>
parents: 1577
diff changeset
   453
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 26)
8d8657654921 Implemented tty put_char and break_ctl callbacks for kernels newer than 2.6.26
Florian Pose <fp@igh-essen.com>
parents: 1577
diff changeset
   454
static int ec_tty_put_char(struct tty_struct *tty, unsigned char ch)
8d8657654921 Implemented tty put_char and break_ctl callbacks for kernels newer than 2.6.26
Florian Pose <fp@igh-essen.com>
parents: 1577
diff changeset
   455
#else
1575
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   456
static void ec_tty_put_char(struct tty_struct *tty, unsigned char ch)
1595
8d8657654921 Implemented tty put_char and break_ctl callbacks for kernels newer than 2.6.26
Florian Pose <fp@igh-essen.com>
parents: 1577
diff changeset
   457
#endif
1575
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   458
{
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   459
    ec_tty_t *t = (ec_tty_t *) tty->driver_data;
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   460
1577
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   461
#if EC_TTY_DEBUG >= 1
1575
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   462
    printk(KERN_INFO PFX "%s(): c=%02x.\n", __func__, (unsigned int) ch);
1577
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   463
#endif
1575
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   464
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   465
    if (ec_tty_tx_space(t)) {
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   466
        t->tx_buffer[t->tx_write_idx] = ch;
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   467
        t->tx_write_idx = (t->tx_write_idx + 1) % EC_TTY_TX_BUFFER_SIZE;
1595
8d8657654921 Implemented tty put_char and break_ctl callbacks for kernels newer than 2.6.26
Florian Pose <fp@igh-essen.com>
parents: 1577
diff changeset
   468
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 26)
8d8657654921 Implemented tty put_char and break_ctl callbacks for kernels newer than 2.6.26
Florian Pose <fp@igh-essen.com>
parents: 1577
diff changeset
   469
        return 1;
8d8657654921 Implemented tty put_char and break_ctl callbacks for kernels newer than 2.6.26
Florian Pose <fp@igh-essen.com>
parents: 1577
diff changeset
   470
#endif
1575
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   471
    } else {
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   472
        printk(KERN_WARNING PFX "%s(): Dropped a byte!\n", __func__);
1595
8d8657654921 Implemented tty put_char and break_ctl callbacks for kernels newer than 2.6.26
Florian Pose <fp@igh-essen.com>
parents: 1577
diff changeset
   473
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 26)
8d8657654921 Implemented tty put_char and break_ctl callbacks for kernels newer than 2.6.26
Florian Pose <fp@igh-essen.com>
parents: 1577
diff changeset
   474
        return 0;
8d8657654921 Implemented tty put_char and break_ctl callbacks for kernels newer than 2.6.26
Florian Pose <fp@igh-essen.com>
parents: 1577
diff changeset
   475
#endif
1575
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   476
    }
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   477
}
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   478
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   479
/*****************************************************************************/
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   480
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   481
static int ec_tty_write_room(struct tty_struct *tty)
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   482
{
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   483
    ec_tty_t *t = (ec_tty_t *) tty->driver_data;
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   484
    int ret = ec_tty_tx_space(t);
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   485
    
1577
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   486
#if EC_TTY_DEBUG >= 2
1575
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   487
    printk(KERN_INFO PFX "%s() = %i.\n", __func__, ret);
1577
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   488
#endif
1575
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   489
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   490
    return ret;
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   491
}
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   492
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   493
/*****************************************************************************/
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   494
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   495
static int ec_tty_chars_in_buffer(struct tty_struct *tty)
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   496
{
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   497
    ec_tty_t *t = (ec_tty_t *) tty->driver_data;
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   498
    int ret;
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   499
    
1577
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   500
#if EC_TTY_DEBUG >= 2
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   501
    printk(KERN_INFO PFX "%s().\n", __func__);
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   502
#endif
1575
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   503
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   504
    ret = ec_tty_tx_size(t);
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   505
1577
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   506
#if EC_TTY_DEBUG >= 2
1575
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   507
    printk(KERN_INFO PFX "%s() = %i.\n", __func__, ret);
1577
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   508
#endif
1575
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   509
    
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   510
    return ret;
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   511
}
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   512
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   513
/*****************************************************************************/
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   514
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   515
static void ec_tty_flush_buffer(struct tty_struct *tty)
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   516
{
1577
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   517
#if EC_TTY_DEBUG >= 2
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   518
    printk(KERN_INFO PFX "%s().\n", __func__);
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   519
#endif
1796
3bb9ca8b58f2 Minor change.
Florian Pose <fp@igh-essen.com>
parents: 1789
diff changeset
   520
3bb9ca8b58f2 Minor change.
Florian Pose <fp@igh-essen.com>
parents: 1789
diff changeset
   521
    // FIXME empty ring buffer
1575
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   522
}
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   523
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   524
/*****************************************************************************/
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   525
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   526
static int ec_tty_ioctl(struct tty_struct *tty, struct file *file,
1779
9fab229d6ca9 Passing tty cflag to serial implementation.
Florian Pose <fp@igh-essen.com>
parents: 1778
diff changeset
   527
        unsigned int cmd, unsigned long arg)
1575
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   528
{
1778
94dbb44884ec Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents: 1595
diff changeset
   529
    ec_tty_t *t = (ec_tty_t *) tty->driver_data;
94dbb44884ec Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents: 1595
diff changeset
   530
    int ret = -ENOTTY;
94dbb44884ec Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents: 1595
diff changeset
   531
    
94dbb44884ec Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents: 1595
diff changeset
   532
#if EC_TTY_DEBUG >= 2
94dbb44884ec Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents: 1595
diff changeset
   533
    printk(KERN_INFO PFX "%s(tty=%p, file=%p, cmd=%08x, arg=%08lx).\n",
94dbb44884ec Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents: 1595
diff changeset
   534
            __func__, tty, file, cmd, arg);
94dbb44884ec Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents: 1595
diff changeset
   535
    printk(KERN_INFO PFX "decoded: type=%02x nr=%u\n",
94dbb44884ec Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents: 1595
diff changeset
   536
            _IOC_TYPE(cmd), _IOC_NR(cmd));
94dbb44884ec Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents: 1595
diff changeset
   537
#endif
94dbb44884ec Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents: 1595
diff changeset
   538
94dbb44884ec Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents: 1595
diff changeset
   539
    switch (cmd) {
1779
9fab229d6ca9 Passing tty cflag to serial implementation.
Florian Pose <fp@igh-essen.com>
parents: 1778
diff changeset
   540
        case TIOCGSERIAL:
9fab229d6ca9 Passing tty cflag to serial implementation.
Florian Pose <fp@igh-essen.com>
parents: 1778
diff changeset
   541
            if (access_ok(VERIFY_WRITE,
1778
94dbb44884ec Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents: 1595
diff changeset
   542
                        (void *) arg, sizeof(struct serial_struct))) {
94dbb44884ec Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents: 1595
diff changeset
   543
                ret = ec_tty_get_serial_info(t, (struct serial_struct *) arg);
94dbb44884ec Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents: 1595
diff changeset
   544
            } else {
94dbb44884ec Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents: 1595
diff changeset
   545
                ret = -EFAULT;
94dbb44884ec Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents: 1595
diff changeset
   546
            }
94dbb44884ec Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents: 1595
diff changeset
   547
            break;
94dbb44884ec Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents: 1595
diff changeset
   548
94dbb44884ec Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents: 1595
diff changeset
   549
        default:
94dbb44884ec Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents: 1595
diff changeset
   550
#if EC_TTY_DEBUG >= 2
1796
3bb9ca8b58f2 Minor change.
Florian Pose <fp@igh-essen.com>
parents: 1789
diff changeset
   551
            printk(KERN_INFO PFX "no ioctl() -> handled by tty core!\n");
1778
94dbb44884ec Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents: 1595
diff changeset
   552
#endif
94dbb44884ec Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents: 1595
diff changeset
   553
            ret = -ENOIOCTLCMD;
94dbb44884ec Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents: 1595
diff changeset
   554
            break;
94dbb44884ec Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents: 1595
diff changeset
   555
    }
94dbb44884ec Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents: 1595
diff changeset
   556
94dbb44884ec Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents: 1595
diff changeset
   557
    return ret;
1575
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   558
}
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   559
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   560
/*****************************************************************************/
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   561
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   562
static void ec_tty_set_termios(struct tty_struct *tty,
1779
9fab229d6ca9 Passing tty cflag to serial implementation.
Florian Pose <fp@igh-essen.com>
parents: 1778
diff changeset
   563
        struct ktermios *old_termios)
9fab229d6ca9 Passing tty cflag to serial implementation.
Florian Pose <fp@igh-essen.com>
parents: 1778
diff changeset
   564
{
9fab229d6ca9 Passing tty cflag to serial implementation.
Florian Pose <fp@igh-essen.com>
parents: 1778
diff changeset
   565
    ec_tty_t *t = (ec_tty_t *) tty->driver_data;
9fab229d6ca9 Passing tty cflag to serial implementation.
Florian Pose <fp@igh-essen.com>
parents: 1778
diff changeset
   566
    int ret;
1778
94dbb44884ec Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents: 1595
diff changeset
   567
1577
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   568
#if EC_TTY_DEBUG >= 2
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   569
    printk(KERN_INFO PFX "%s().\n", __func__);
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   570
#endif
1778
94dbb44884ec Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents: 1595
diff changeset
   571
94dbb44884ec Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents: 1595
diff changeset
   572
    if (tty->termios->c_cflag == old_termios->c_cflag)
94dbb44884ec Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents: 1595
diff changeset
   573
        return;
94dbb44884ec Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents: 1595
diff changeset
   574
94dbb44884ec Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents: 1595
diff changeset
   575
#if EC_TTY_DEBUG >= 2
94dbb44884ec Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents: 1595
diff changeset
   576
    printk(KERN_INFO "cflag changed from %x to %x.\n",
94dbb44884ec Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents: 1595
diff changeset
   577
            old_termios->c_cflag, tty->termios->c_cflag);
94dbb44884ec Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents: 1595
diff changeset
   578
#endif
1779
9fab229d6ca9 Passing tty cflag to serial implementation.
Florian Pose <fp@igh-essen.com>
parents: 1778
diff changeset
   579
1787
439f186185be Callback set via own structure.
Florian Pose <fp@igh-essen.com>
parents: 1786
diff changeset
   580
    ret = t->ops.cflag_changed(t->cb_data, tty->termios->c_cflag);
1779
9fab229d6ca9 Passing tty cflag to serial implementation.
Florian Pose <fp@igh-essen.com>
parents: 1778
diff changeset
   581
    if (ret) {
9fab229d6ca9 Passing tty cflag to serial implementation.
Florian Pose <fp@igh-essen.com>
parents: 1778
diff changeset
   582
        printk(KERN_ERR PFX "ERROR: cflag 0x%x not accepted.\n",
9fab229d6ca9 Passing tty cflag to serial implementation.
Florian Pose <fp@igh-essen.com>
parents: 1778
diff changeset
   583
                tty->termios->c_cflag);
9fab229d6ca9 Passing tty cflag to serial implementation.
Florian Pose <fp@igh-essen.com>
parents: 1778
diff changeset
   584
        tty->termios->c_cflag = old_termios->c_cflag;
9fab229d6ca9 Passing tty cflag to serial implementation.
Florian Pose <fp@igh-essen.com>
parents: 1778
diff changeset
   585
    }
1575
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   586
}
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   587
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   588
/*****************************************************************************/
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   589
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   590
static void ec_tty_stop(struct tty_struct *tty)
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   591
{
1577
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   592
#if EC_TTY_DEBUG >= 2
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   593
    printk(KERN_INFO PFX "%s().\n", __func__);
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   594
#endif
1575
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   595
}
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   596
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   597
/*****************************************************************************/
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   598
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   599
static void ec_tty_start(struct tty_struct *tty)
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   600
{
1577
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   601
#if EC_TTY_DEBUG >= 2
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   602
    printk(KERN_INFO PFX "%s().\n", __func__);
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   603
#endif
1575
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   604
}
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   605
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   606
/*****************************************************************************/
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   607
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   608
static void ec_tty_hangup(struct tty_struct *tty)
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   609
{
1577
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   610
#if EC_TTY_DEBUG >= 2
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   611
    printk(KERN_INFO PFX "%s().\n", __func__);
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   612
#endif
1575
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   613
}
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   614
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   615
/*****************************************************************************/
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   616
1595
8d8657654921 Implemented tty put_char and break_ctl callbacks for kernels newer than 2.6.26
Florian Pose <fp@igh-essen.com>
parents: 1577
diff changeset
   617
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 27)
8d8657654921 Implemented tty put_char and break_ctl callbacks for kernels newer than 2.6.26
Florian Pose <fp@igh-essen.com>
parents: 1577
diff changeset
   618
static int ec_tty_break(struct tty_struct *tty, int break_state)
8d8657654921 Implemented tty put_char and break_ctl callbacks for kernels newer than 2.6.26
Florian Pose <fp@igh-essen.com>
parents: 1577
diff changeset
   619
#else
1575
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   620
static void ec_tty_break(struct tty_struct *tty, int break_state)
1595
8d8657654921 Implemented tty put_char and break_ctl callbacks for kernels newer than 2.6.26
Florian Pose <fp@igh-essen.com>
parents: 1577
diff changeset
   621
#endif
1575
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   622
{
1577
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   623
#if EC_TTY_DEBUG >= 2
1575
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   624
    printk(KERN_INFO PFX "%s(break_state = %i).\n", __func__, break_state);
1577
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   625
#endif
1595
8d8657654921 Implemented tty put_char and break_ctl callbacks for kernels newer than 2.6.26
Florian Pose <fp@igh-essen.com>
parents: 1577
diff changeset
   626
8d8657654921 Implemented tty put_char and break_ctl callbacks for kernels newer than 2.6.26
Florian Pose <fp@igh-essen.com>
parents: 1577
diff changeset
   627
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 27)
8d8657654921 Implemented tty put_char and break_ctl callbacks for kernels newer than 2.6.26
Florian Pose <fp@igh-essen.com>
parents: 1577
diff changeset
   628
    return -EIO; // not implemented
8d8657654921 Implemented tty put_char and break_ctl callbacks for kernels newer than 2.6.26
Florian Pose <fp@igh-essen.com>
parents: 1577
diff changeset
   629
#endif
1575
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   630
}
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   631
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   632
/*****************************************************************************/
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   633
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   634
static void ec_tty_send_xchar(struct tty_struct *tty, char ch)
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   635
{
1577
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   636
#if EC_TTY_DEBUG >= 2
1575
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   637
    printk(KERN_INFO PFX "%s(ch=%02x).\n", __func__, (unsigned int) ch);
1577
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   638
#endif
1575
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   639
}
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   640
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   641
/*****************************************************************************/
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   642
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   643
static void ec_tty_wait_until_sent(struct tty_struct *tty, int timeout)
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   644
{
1577
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   645
#if EC_TTY_DEBUG >= 2
1575
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   646
    printk(KERN_INFO PFX "%s(timeout=%i).\n", __func__, timeout);
1577
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   647
#endif
1575
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   648
}
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   649
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   650
/*****************************************************************************/
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   651
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   652
static const struct tty_operations ec_tty_ops = {
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   653
    .open = ec_tty_open,
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   654
    .close = ec_tty_close,
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   655
    .write = ec_tty_write,
1779
9fab229d6ca9 Passing tty cflag to serial implementation.
Florian Pose <fp@igh-essen.com>
parents: 1778
diff changeset
   656
    .put_char = ec_tty_put_char,
9fab229d6ca9 Passing tty cflag to serial implementation.
Florian Pose <fp@igh-essen.com>
parents: 1778
diff changeset
   657
    .write_room = ec_tty_write_room,
9fab229d6ca9 Passing tty cflag to serial implementation.
Florian Pose <fp@igh-essen.com>
parents: 1778
diff changeset
   658
    .chars_in_buffer = ec_tty_chars_in_buffer,
9fab229d6ca9 Passing tty cflag to serial implementation.
Florian Pose <fp@igh-essen.com>
parents: 1778
diff changeset
   659
    .flush_buffer = ec_tty_flush_buffer,
9fab229d6ca9 Passing tty cflag to serial implementation.
Florian Pose <fp@igh-essen.com>
parents: 1778
diff changeset
   660
    .ioctl = ec_tty_ioctl,
9fab229d6ca9 Passing tty cflag to serial implementation.
Florian Pose <fp@igh-essen.com>
parents: 1778
diff changeset
   661
    .set_termios = ec_tty_set_termios,
9fab229d6ca9 Passing tty cflag to serial implementation.
Florian Pose <fp@igh-essen.com>
parents: 1778
diff changeset
   662
    .stop = ec_tty_stop,
9fab229d6ca9 Passing tty cflag to serial implementation.
Florian Pose <fp@igh-essen.com>
parents: 1778
diff changeset
   663
    .start = ec_tty_start,
9fab229d6ca9 Passing tty cflag to serial implementation.
Florian Pose <fp@igh-essen.com>
parents: 1778
diff changeset
   664
    .hangup = ec_tty_hangup,
9fab229d6ca9 Passing tty cflag to serial implementation.
Florian Pose <fp@igh-essen.com>
parents: 1778
diff changeset
   665
    .break_ctl = ec_tty_break,
9fab229d6ca9 Passing tty cflag to serial implementation.
Florian Pose <fp@igh-essen.com>
parents: 1778
diff changeset
   666
    .send_xchar = ec_tty_send_xchar,
9fab229d6ca9 Passing tty cflag to serial implementation.
Florian Pose <fp@igh-essen.com>
parents: 1778
diff changeset
   667
    .wait_until_sent = ec_tty_wait_until_sent,
1575
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   668
};
1568
d9bbbe1883ab Register a TTY driver with one device.
Florian Pose <fp@igh-essen.com>
parents: 1565
diff changeset
   669
1569
61f5f4c35883 Interface management.
Florian Pose <fp@igh-essen.com>
parents: 1568
diff changeset
   670
/******************************************************************************
61f5f4c35883 Interface management.
Florian Pose <fp@igh-essen.com>
parents: 1568
diff changeset
   671
 * Public functions and methods
61f5f4c35883 Interface management.
Florian Pose <fp@igh-essen.com>
parents: 1568
diff changeset
   672
 *****************************************************************************/
61f5f4c35883 Interface management.
Florian Pose <fp@igh-essen.com>
parents: 1568
diff changeset
   673
1787
439f186185be Callback set via own structure.
Florian Pose <fp@igh-essen.com>
parents: 1786
diff changeset
   674
ec_tty_t *ectty_create(const ec_tty_operations_t *ops, void *cb_data)
1569
61f5f4c35883 Interface management.
Florian Pose <fp@igh-essen.com>
parents: 1568
diff changeset
   675
{
61f5f4c35883 Interface management.
Florian Pose <fp@igh-essen.com>
parents: 1568
diff changeset
   676
    ec_tty_t *tty;
61f5f4c35883 Interface management.
Florian Pose <fp@igh-essen.com>
parents: 1568
diff changeset
   677
    int minor, ret;
61f5f4c35883 Interface management.
Florian Pose <fp@igh-essen.com>
parents: 1568
diff changeset
   678
2028
55854f070c4a use rt_mutex instead of semaphore for mutual exclusion (use --enable-mutex)
Martin Troxler <ch1010277@ch10pc446>
parents: 1975
diff changeset
   679
    if (ec_mutex_lock_interruptible(&tty_sem)) {
1569
61f5f4c35883 Interface management.
Florian Pose <fp@igh-essen.com>
parents: 1568
diff changeset
   680
        return ERR_PTR(-EINTR);
61f5f4c35883 Interface management.
Florian Pose <fp@igh-essen.com>
parents: 1568
diff changeset
   681
    }
61f5f4c35883 Interface management.
Florian Pose <fp@igh-essen.com>
parents: 1568
diff changeset
   682
61f5f4c35883 Interface management.
Florian Pose <fp@igh-essen.com>
parents: 1568
diff changeset
   683
    for (minor = 0; minor < EC_TTY_MAX_DEVICES; minor++) {
61f5f4c35883 Interface management.
Florian Pose <fp@igh-essen.com>
parents: 1568
diff changeset
   684
        if (!ttys[minor]) {
1575
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   685
            printk(KERN_INFO PFX "Creating TTY interface %i.\n", minor);
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   686
1569
61f5f4c35883 Interface management.
Florian Pose <fp@igh-essen.com>
parents: 1568
diff changeset
   687
            tty = kmalloc(sizeof(ec_tty_t), GFP_KERNEL);
61f5f4c35883 Interface management.
Florian Pose <fp@igh-essen.com>
parents: 1568
diff changeset
   688
            if (!tty) {
2028
55854f070c4a use rt_mutex instead of semaphore for mutual exclusion (use --enable-mutex)
Martin Troxler <ch1010277@ch10pc446>
parents: 1975
diff changeset
   689
                ec_mutex_unlock(&tty_sem);
1570
7a2a58107dd8 Use own PFX for printk.
Florian Pose <fp@igh-essen.com>
parents: 1569
diff changeset
   690
                printk(KERN_ERR PFX "Failed to allocate memory.\n");
1569
61f5f4c35883 Interface management.
Florian Pose <fp@igh-essen.com>
parents: 1568
diff changeset
   691
                return ERR_PTR(-ENOMEM);
61f5f4c35883 Interface management.
Florian Pose <fp@igh-essen.com>
parents: 1568
diff changeset
   692
            }
61f5f4c35883 Interface management.
Florian Pose <fp@igh-essen.com>
parents: 1568
diff changeset
   693
1787
439f186185be Callback set via own structure.
Florian Pose <fp@igh-essen.com>
parents: 1786
diff changeset
   694
            ret = ec_tty_init(tty, minor, ops, cb_data);
1569
61f5f4c35883 Interface management.
Florian Pose <fp@igh-essen.com>
parents: 1568
diff changeset
   695
            if (ret) {
2028
55854f070c4a use rt_mutex instead of semaphore for mutual exclusion (use --enable-mutex)
Martin Troxler <ch1010277@ch10pc446>
parents: 1975
diff changeset
   696
                ec_mutex_unlock(&tty_sem);
1569
61f5f4c35883 Interface management.
Florian Pose <fp@igh-essen.com>
parents: 1568
diff changeset
   697
                kfree(tty);
61f5f4c35883 Interface management.
Florian Pose <fp@igh-essen.com>
parents: 1568
diff changeset
   698
                return ERR_PTR(ret);
61f5f4c35883 Interface management.
Florian Pose <fp@igh-essen.com>
parents: 1568
diff changeset
   699
            }
61f5f4c35883 Interface management.
Florian Pose <fp@igh-essen.com>
parents: 1568
diff changeset
   700
61f5f4c35883 Interface management.
Florian Pose <fp@igh-essen.com>
parents: 1568
diff changeset
   701
            ttys[minor] = tty;
2028
55854f070c4a use rt_mutex instead of semaphore for mutual exclusion (use --enable-mutex)
Martin Troxler <ch1010277@ch10pc446>
parents: 1975
diff changeset
   702
            ec_mutex_unlock(&tty_sem);
1569
61f5f4c35883 Interface management.
Florian Pose <fp@igh-essen.com>
parents: 1568
diff changeset
   703
            return tty;
61f5f4c35883 Interface management.
Florian Pose <fp@igh-essen.com>
parents: 1568
diff changeset
   704
        }
61f5f4c35883 Interface management.
Florian Pose <fp@igh-essen.com>
parents: 1568
diff changeset
   705
    }
61f5f4c35883 Interface management.
Florian Pose <fp@igh-essen.com>
parents: 1568
diff changeset
   706
2028
55854f070c4a use rt_mutex instead of semaphore for mutual exclusion (use --enable-mutex)
Martin Troxler <ch1010277@ch10pc446>
parents: 1975
diff changeset
   707
    ec_mutex_unlock(&tty_sem);
1570
7a2a58107dd8 Use own PFX for printk.
Florian Pose <fp@igh-essen.com>
parents: 1569
diff changeset
   708
    printk(KERN_ERR PFX "No free interfaces avaliable.\n");
1569
61f5f4c35883 Interface management.
Florian Pose <fp@igh-essen.com>
parents: 1568
diff changeset
   709
    return ERR_PTR(-EBUSY);
61f5f4c35883 Interface management.
Florian Pose <fp@igh-essen.com>
parents: 1568
diff changeset
   710
}
61f5f4c35883 Interface management.
Florian Pose <fp@igh-essen.com>
parents: 1568
diff changeset
   711
61f5f4c35883 Interface management.
Florian Pose <fp@igh-essen.com>
parents: 1568
diff changeset
   712
/*****************************************************************************/
61f5f4c35883 Interface management.
Florian Pose <fp@igh-essen.com>
parents: 1568
diff changeset
   713
61f5f4c35883 Interface management.
Florian Pose <fp@igh-essen.com>
parents: 1568
diff changeset
   714
void ectty_free(ec_tty_t *tty)
61f5f4c35883 Interface management.
Florian Pose <fp@igh-essen.com>
parents: 1568
diff changeset
   715
{
1575
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   716
    printk(KERN_INFO PFX "Freeing TTY interface %i.\n", tty->minor);
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   717
1569
61f5f4c35883 Interface management.
Florian Pose <fp@igh-essen.com>
parents: 1568
diff changeset
   718
    ec_tty_clear(tty);
1570
7a2a58107dd8 Use own PFX for printk.
Florian Pose <fp@igh-essen.com>
parents: 1569
diff changeset
   719
    ttys[tty->minor] = NULL;
1569
61f5f4c35883 Interface management.
Florian Pose <fp@igh-essen.com>
parents: 1568
diff changeset
   720
    kfree(tty);
61f5f4c35883 Interface management.
Florian Pose <fp@igh-essen.com>
parents: 1568
diff changeset
   721
}
61f5f4c35883 Interface management.
Florian Pose <fp@igh-essen.com>
parents: 1568
diff changeset
   722
1568
d9bbbe1883ab Register a TTY driver with one device.
Florian Pose <fp@igh-essen.com>
parents: 1565
diff changeset
   723
/*****************************************************************************/
d9bbbe1883ab Register a TTY driver with one device.
Florian Pose <fp@igh-essen.com>
parents: 1565
diff changeset
   724
1575
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   725
unsigned int ectty_tx_data(ec_tty_t *tty, uint8_t *buffer, size_t size)
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   726
{
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   727
    unsigned int data_size = min(ec_tty_tx_size(tty), size), i;
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   728
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   729
    if (data_size)  {
1577
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   730
#if EC_TTY_DEBUG >= 1
1575
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   731
        printk(KERN_INFO PFX "Fetching %u bytes to send.\n", data_size);
1577
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   732
#endif
1575
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   733
    }
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   734
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   735
    for (i = 0; i < data_size; i++) {
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   736
        buffer[i] = tty->tx_buffer[tty->tx_read_idx];
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   737
        tty->tx_read_idx = (tty->tx_read_idx + 1) % EC_TTY_TX_BUFFER_SIZE;
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   738
    }
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   739
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   740
    if (data_size) {
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   741
        tty->wakeup = 1;
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   742
    }
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   743
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   744
    return data_size;
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   745
}
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   746
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   747
/*****************************************************************************/
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   748
1577
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   749
void ectty_rx_data(ec_tty_t *tty, const uint8_t *buffer, size_t size)
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   750
{
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   751
    size_t to_recv;
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   752
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   753
    if (size)  {
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   754
        unsigned int i;
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   755
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   756
#if EC_TTY_DEBUG >= 1
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   757
        printk(KERN_INFO PFX "Received %u bytes.\n", size);
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   758
#endif
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   759
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   760
        to_recv = min(ec_tty_rx_space(tty), size);
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   761
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   762
        if (to_recv < size) {
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   763
            printk(KERN_WARNING PFX "Dropping %u bytes.\n", size - to_recv);
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   764
        }
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   765
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   766
        for (i = 0; i < size; i++) {
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   767
            tty->rx_buffer[tty->rx_write_idx] = buffer[i];
1786
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   768
            tty->rx_write_idx =
7198caede741 Sorted methods.
Florian Pose <fp@igh-essen.com>
parents: 1782
diff changeset
   769
                (tty->rx_write_idx + 1) % EC_TTY_RX_BUFFER_SIZE;
1577
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   770
        }
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   771
    }
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   772
}
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   773
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   774
/*****************************************************************************/
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   775
1565
8c526cfe1399 Base files for new TTY driver.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   776
/** \cond */
8c526cfe1399 Base files for new TTY driver.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   777
8c526cfe1399 Base files for new TTY driver.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   778
module_init(ec_tty_init_module);
8c526cfe1399 Base files for new TTY driver.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   779
module_exit(ec_tty_cleanup_module);
8c526cfe1399 Base files for new TTY driver.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   780
1569
61f5f4c35883 Interface management.
Florian Pose <fp@igh-essen.com>
parents: 1568
diff changeset
   781
EXPORT_SYMBOL(ectty_create);
61f5f4c35883 Interface management.
Florian Pose <fp@igh-essen.com>
parents: 1568
diff changeset
   782
EXPORT_SYMBOL(ectty_free);
1575
17598f2332b6 Send direction works!
Florian Pose <fp@igh-essen.com>
parents: 1572
diff changeset
   783
EXPORT_SYMBOL(ectty_tx_data);
1577
fa3f66b783c1 Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents: 1575
diff changeset
   784
EXPORT_SYMBOL(ectty_rx_data);
1569
61f5f4c35883 Interface management.
Florian Pose <fp@igh-essen.com>
parents: 1568
diff changeset
   785
1565
8c526cfe1399 Base files for new TTY driver.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   786
/** \endcond */
8c526cfe1399 Base files for new TTY driver.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   787
8c526cfe1399 Base files for new TTY driver.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   788
/*****************************************************************************/